David Bradley reprises his role as the First Doctor for this special lockdown adventure.
Get involved by using the hashtag #FearIsASuperpower.
Use the hashtag #VolcanoDay to take part on Twitter.
Use the hashtag #TruthOrConsequences from 7:15pm (BST) tonight.
“A spaceship from the 51st Century stalking a woman from the 18th. Why?”
Rob Shearman, Russell T Davies, Nicholas Briggs, and Barnaby Edwards will be taking part on Twitter.
Paul Cornell, Charles Palmer, and Lor Wilson will all be taking part on Twitter.
Farewell, Sarah Jane lovingly pays tribute to the wonderful Elisabeth Sladen.
David Tennant, Catherine Tate, Freema Agyeman, John Barrowman, Russell T Davies, and Graeme Harper will all be on Twitter for the event.
Borna Matosic and Emily Cook organise virtual choir singalong of The Rings of Akhaten.